• KAGRA
• Commissioning
• DailyWork
• 2019-07-16

2019/7/16(Tue.)

Schedule

• ~7/31: Trial for DRMI with polarization.
• 7/6~: Trial for mass lock
• ITMX
• ETMX
• ITMY
  • 7/4: Turbo pump on
• ETMY
  • 7/4: Turbo pump on
• Long term:

  • 4/22-5/31: Yarm commissioning

  • 5/27-6/30: DRMI commissioning

  • 7/1-8/9: FPMI/DRFPMI commissioning
  • 8/12-10/4: ASC
  • 10/7-11/15: Post Commissioning
  • 11/18-12/13: Noise hunting

Note

Night work

Weekend

Report of work

• OMC: Beam spot on mirror moved. One (or more) of the mirrors seems to be misaligned. OMC will be pulled tomorrow.
• Y arm: 20dB suppression on LSC below 1Hz was seen on mass lock trial.
  • Opleve control was slightly changed from IM control to TM control.
  • High frequency is limited by noise. Needs high power coil driver modification.
• Type B: H2 on SR3 was noisy, but needs more time to investigate it.
• 80mHz peak was reduced by changing damping setting.
• RTPC for ASC and ALS were dead somehow.

Work plan

Today's work plan: 2019/7/16 1PM - 2019/7/17 1PM

Commissioning leader: Miyakawa (July 16th), Aso (July 17th)

Afternoon

• ETMY L2Angle decoupling (Yamada, Nakano)

• Check the schematic of the High Power Coil Driver (Fabian, Terrence)
• Fix the CARM board boost issue (Enomoto)
• Design a filter for DARM (Stefan)

Evening

• Y-arm mass lock trial (SB, EY, MN, et al)

Morning

• DGS maintenance
  • Power supply replacement of SR3 (Yamamoto)
• ITM T-cam computer replacement (Yokozawa)
• OMC extraction (Aso, et al)
• Check dimensions around OSTM (Takahashi)

Standing issues

• Y-arm lock
  • ETMY suspension control

    • L2Angle decoupling

    • ETMY coil driver range increase
  • CARM board boost does not engage
• DRMI lock stability
  • Model HOM-PHD signal distortion (Aso, Kokeyama)
  • Search for better Gouy phase in PRC
• Initial alignment automation
• Type-A related
  • Add aligned state in Guardian (Kokeyama)
• Type-B related
  • SR3 Yaw motion is too large
    • Different ground level between the IO chasis and the AA filter box may be the reason
    • Replace the DC power supply
  • BS IM2TM transfer function measurement
• Type-C related
  • Check dimensions around the OSTM
  • OSEM characterization for OSTM
• OMC
  • Extract OMC
  • Check the OMC on the AS table
• Laser safety
  • Debug the laser safety guardian